Click here to view and discuss this page in DocCommentXchange. In the future, you will be sent there automatically.

SQL Anywhere 10.0.1 » SQL Anywhere Server - SQL Usage » Ensuring Data Integrity » Using column defaults

The NEWID default Next Page

The NULL default

For columns that allow NULL values, specifying a NULL default is exactly the same as not specifying a default at all. If the client inserting the row does not explicitly assign a value, the row automatically receives A NULL value.

You can use NULL defaults when information for some columns is optional or not always available.

For more information about the NULL value, see NULL value.